I have a ton of Lock and Lock boxes, (like many on here, I suspect :blush but I've noticed that they are retaining the smell and colour of the food I'm storing in them after washing. Most recently, I've had one with an orange tinge after freezing Chilli con Carne and one that smells of chicken stock. I don't have a dishwasher, instead I scrub them in very hot water and Fairy Liquid. Has this happened to anyone else, and have you any suggestions as to how I can get them clean please?